直接从MySQL数据库将日期动态格式化为datetime对象

Question

I have a MySQL database with a DATETIME formatted column, which is populated with the date of the row entry. This data is formatted in my project as "dd/MM/yyyy hh:mm:ss tt" .

I want to convert this date to a datetime object dynamically (from each database entry), but I currently receive the error

"String was not recognized as a valid DateTime."

However, if I use the actual outputted string of the date, it does work:

using System.Globalization;

var date = DateTime.ParseExact("11/12/2013 11:13:45 PM", 
                               "dd/MM/yyyy hh:mm:ss tt", 
                               CultureInfo.InvariantCulture);

But if I dynamically add the date, it doesn't work:

using System.Globalization;

var dt = item.Timestamp;
var date = DateTime.ParseExact(dt, 
                               "dd/MM/yyyy hh:mm:ss tt", 
                               CultureInfo.InvariantCulture);

If I were to output the dt variable it would display as "11/13/2013 11:13:21 PM" .

Can anyone see why my dynamic dates aren't being recognised?

Answer 1

Actually, your problem is the day-month order.
At the end you said the date displays as "11/13/2013 11:13:21 PM" .
In this case, you need to parse in this correct order; it errors because there's no month 13.

So, make the format be "MM/dd/yyyy hh:mm:ss tt" .

In other words, you wouldn't have noticed this problem yesterday!